Monthly Climate Summary for August 2008 at Hampstead

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An exceptional shortage of sunshine; frequent rain; cool days and warm nights

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Overall mean temperature was

16.9

ºC

which is

-0.3

degC

compared with the 1971-2000 average

Mean day maximum (09-21) was

20.3

ºC

Mean night minimum (21-09) was

13.7

ºC

Mean 24hr maximum (09-09) was

20.3

ºC

which is

-1.5

degC

compared with the 1971-2000 average

Mean 24hr minimum (09-09) was

13.6

ºC

which is

+1.0

degC

compared with the 1971-2000 average

Highest day max was

25.4

ºC

on  the

30

Lowest day max was

16.8

ºC

on  the

13

Highest night min was

17.1

ºC

on  the

29

Lowest night min was

8.8

ºC

on  the

23

Lowest grass min was

5.1

ºC

on  the

23

Total rainfall this month was

97.2

mm

which is

156.8

per  cent

of the 1971-2000 average

Highest daily fall was

35.2

mm

on  the

31

Number of hours with rain was

73.0

hrs

Equiv. TSR rainfall duration was

51.1

hrs

which is

150.3

per  cent

of the 1971-2000 average

Highest no of wet hrs

11.0

hrs

on  the

9

Highest equiv duration

9.1

hrs

on  the

9

Mean rainfall intensity

1.90

mm/h

Total sunshine this month was

97.1

hrs

which is

56.5

per  cent

of the 1971-2000 average

Equiv. C/S sunshine total was

106.8

hrs

which is

56.5

per  cent

of the 1971-2000 average

Highest daily sun was

8.1

hrs

on  the

15

Maximum  snow depth  was

0.0

cm

on the

Mean sea-level pressure at 09Z

1011.9

mbar

which is

-4.4

mbar

compared with the 1961-1990 average

Highest pressure at 09Z

1022.8

mbar

on  the

27

Lowest  pressure at 09Z

989.9

mbar

on  the

12

Number of days with:

Air Frost

0

0.2mm rain

20

No  sun

2

Snow lying

0

Grnd Frost

0

1.0mm

17

3h  sun

16

Snow/sleet

0

Max < 0ºC

0

5mm

5

6h  sun

3

Hail

0

Max > 10

31

10mm

1

9h  sun

0

Thunder

1

Max > 20

17

25mm

1

12h sun

0

Fog at 09Z

0

Max > 30

0

15h sun

0

Gale

0

Notable events during the month: